figure (1);
plot(cx);      %% Key clicks file, X dimension
label('Key clicks X dimension, time domain');

figure(2);
spec_cx = specgram(cx-mean(cx));
% mesh(20*log(abs(spec_cx )))
% mesh(max(-80,20*log(abs(spec_cx ))))
mesh(max(-100,20*log(abs(spec_cx ))))

figure(3)
%% snx - "scale, no tongue, X dimension".  
%% "no tongue" = slurred = notes articulated just with key closures, not
%% with the tongue. 
spec_snx = specgram(snx-mean(snx));
mesh(max(-100,20*log(abs(spec_snx ))))
